End Cap-MB are specifically designed Electrofusion fittings used to close HD-PE Pipe ends.
USP:
Large coupler depth for ease of pipe guiding (no holding clamps required) 
Extra wide fusion zones 
Maximum stability through great wall thickness 
Cold zones at the front side and in the middle of the coupler 
Exposed heating coil for direct heat transmission to the pipe 
Small annular gap for build-up of optimum joining pressure in the fusion zone